The ONLY true measure of the “impact” of this will be reviewing total deaths against previous years.
So, if 100 people died in your country every March for the last five years (adjusted for population) and 110 died this year...you should be able to make a case that the increase is “related” to something.
But, they still argue about the Spanish Flu’s death count. So...
See post 47 on this thread, the actual excess deaths are already present in NYC